It may be a little more difficult that you think. New vehicles using a databus or Lan system as the Jeep does will require an interface module to change out the factory head unit.
If you do it your self do not go old school and try to cut the plug odd and hard wire it, you will damage the vehicle and possibly take out a computer.

Get qualified help and the right parts from a stereo shop and then try it your self.

Ask me anything else in a PM and Ill redirect you to my work email I do car stereo and 12 volt electronics for a living!

On the Liberty, it's a cake walk. One of the easiest installations I've ever done. You need a wiring adapter and a mounting kit...both available at Walmart for less than $20, and you need an antenna adapter, which is available from places like Crutchfield. Then all you do is connect the wiring from the adapter to the wiring included with your new radio. Use crimp caps to do this (also available at Walmart). Then...the new radio is simply plug and play.

I can do one in less than 30 minutes on the KJ. There's only one screw and then the entire bezel around the radio pops off.

I just went to the store and I was about to have the geek squad install it but I decided to try it myself. He gave me all the adapters I need but I asked him about the steering wheel controls and he said that part would cost $100 for it to work.

More info please, I need at least the volume to work, I use it all the time.

On the Liberty, it's a cake walk. One of the easiest installations I've ever done. You need a wiring adapter and a mounting kit...both available at Walmart for less than $20, and you need an antenna adapter, which is available from places like Crutchfield. Then all you do is connect the wiring from the adapter to the wiring included with your new radio. Use crimp caps to do this (also available at Walmart). Then...the new radio is simply plug and play.

I can do one in less than 30 minutes on the KJ. There's only one screw and then the entire bezel around the radio pops off.

It allows you to connect the factory Jeep antenna to the back of your new aftermarket head unit. Yes, it is necessary if you want to listen to AM/FM stations.

As far as steering wheel controls go... get the Axxess ASWC adapter. It's only $69 shipped from Crutchfield, it only takes 3 wires to hook up to the Liberty, and it works like a charm. It's by far the easiest and best solution to keep your steering wheel buttons useable. (Mine is a Pioneer unit...I assume other brands will be the same).

Long story short. On Thursday I went to Best Buy. I bought the stereo the wire adapter and the mounting kit. He told me Geek Squad can install it for $49 but I decided to try it myself. Well he didn't tell me about any antenna adapter until I am ready to plug everything in after connecting all the wires. I thought I was doing something wrong but now I see I need an adapter. I am going back tomorrow.